MS+303U Online UPS

A. Product Overview

The COSMIC MS 303U Three Phase Online UPS is designed for applications where equipment must continue operating during power failure, voltage fluctuation and other electrical disturbances.

It accepts three-phase AC input and supplies a regulated three-phase AC output. The MS 303 series is available in capacities from 10 kVA to 200 kVA, making it suitable for medium and high-power installations. The system uses advanced PWM high-frequency switching, DSP-based control, IGBT power devices, double-conversion technology and an isolated output architecture.

The Online UPS is intended to provide uninterrupted and stable power for critical industrial and commercial equipment. Depending on the selected configuration, optional features may include a static switch, hot standby arrangement and SNMP-based monitoring.

Main Product Highlights

• Three-phase input and three-phase output configuration
• Capacity range from 10 kVA to 200 kVA
• DSP-based double-conversion technology
• IGBT PWM power conversion
• Advanced high-frequency switching
• Isolated output
• Nil transfer time during mains failure
• Designed for indoor industrial and commercial installations
• Optional static switch, hot standby and SNMP monitoring
• Power backup and voltage regulation in one system

B. Working Principle

The COSMIC MS 303U operates using an Online double-conversion process.

First, the incoming three-phase AC supply is converted into DC power by the rectifier section. This conversion helps separate the connected equipment from disturbances present in the incoming mains supply.

The DC power feeds the inverter section and supports battery charging. The inverter then converts the DC power into controlled three-phase AC output for the connected load.

During normal operation, the load continuously receives power through the inverter. When the mains supply fails, the battery bank continues supplying the DC bus, allowing the inverter to maintain output without a switching delay. This operating method provides nil transfer time and helps prevent connected equipment from restarting or shutting down during a power interruption.

When mains power returns, the rectifier resumes supplying the inverter and recharges the battery bank. The product listing specifies a typical battery recharging period of approximately 8 to 10 hours, although the actual time depends on battery capacity, discharge level and charger configuration.

C. Why It Is Used

The COSMIC MS 303U Online UPS is used to protect critical equipment from interruptions and disturbances in the electrical supply.

Continuous Power During Outages

It maintains the output supply through the inverter when the mains supply fails. Nil transfer time is particularly important for equipment that may reset, stop or lose data because of even a brief interruption.

Stable Power for Sensitive Equipment

Double-conversion technology regenerates the output supply rather than directly passing unstable mains power to the connected load. This helps provide controlled power for sensitive electronic systems.

Protection of Industrial Operations

Unexpected shutdowns can interrupt manufacturing processes, stop control systems and increase production losses. An Online UPS supports critical machinery, control panels and electronic systems until mains power returns or an alternate power source becomes available.

Support for Medium and High-Power Loads

With capacities ranging from 10 kVA to 200 kVA, the MS 303 series can be selected for different industrial and commercial load requirements.

Centralised Monitoring

SNMP monitoring can be selected as an optional feature for installations that require network-based UPS supervision and status monitoring.

D. Suitable Buyers

The COSMIC MS 303U is suitable for organisations that operate critical three-phase electrical loads and require continuous, regulated power.

Manufacturing Industries

Suitable for production equipment, industrial control systems, automation panels and electrically sensitive machinery where unexpected shutdowns can interrupt operations.

Data Centres and Server Facilities

Useful for protecting servers, network infrastructure, storage systems and supporting equipment from power interruptions.

Hospitals and Healthcare Facilities

Suitable for supporting eligible medical, diagnostic, laboratory and hospital infrastructure after the load requirement and equipment compatibility have been properly evaluated.

Pharmaceutical Companies and Laboratories

Can support testing instruments, laboratory equipment, process systems, monitoring devices and controlled production facilities.

Commercial Buildings

Suitable for offices, business facilities, communication systems, security infrastructure and centralised IT equipment.

Educational and Government Institutions

Can be considered for laboratories, computer centres, server rooms, communication systems and critical administrative infrastructure.

Cosmicplus Global India identifies manufacturing companies, industries, government organisations, educational institutions, healthcare units, pharmaceutical facilities, hospitals and laboratories among the sectors it serves.

Frequently Asked Questions

1. What is the COSMIC MS 303U Online UPS?

The COSMIC MS 303U is a three-phase input and three-phase output Online UPS developed for industrial and commercial power backup and voltage regulation applications.

2. What capacity range is available in the MS 303U series?

The MS 303 series is available in power ratings from 10 kVA to 200 kVA. The correct capacity should be selected according to the connected load, starting current, future expansion and required backup time.

3. Is the MS 303U a three-phase UPS?

Yes. This model is intended for three-phase input and three-phase output applications.

4. Which technology is used in this Online UPS?

It uses advanced PWM high-frequency switching, DSP-based control, IGBT devices and double-conversion technology with isolated output.

5. Does the UPS have a transfer delay during a power failure?

The product information specifies nil transfer time. Because the load is continuously supplied through the inverter, the battery system can support the DC bus when the mains fails without the switching delay associated with conventional standby systems.

6. Can the COSMIC MS 303U be used for industrial machinery?

Yes, it is designed for industrial and commercial applications. Final selection should be based on the machine load, motor starting current, load type, power factor and required backup duration.

7. Can it be used for a data centre or server room?

Yes, it can be considered for server rooms, data centres and network infrastructure where uninterrupted and regulated power is required. The UPS capacity and redundancy arrangement should be selected after conducting a proper load assessment.

8. Is SNMP monitoring available?

SNMP is listed as an optional feature. It may be used for network-based monitoring of UPS operating conditions, depending on the selected configuration.

9. Are static switch and hot standby options available?

Yes. Static switch and hot standby are listed among the optional features for the Online UPS range. Availability should be confirmed for the required capacity and project configuration.

10. How long does the battery take to recharge?

The listed recharging time is approximately 8 to 10 hours. Actual charging time depends on battery capacity, battery condition, depth of discharge and charger rating.

11. How is the required UPS capacity calculated?

The capacity should be calculated by considering the total connected load, load power factor, starting current, future expansion, required safety margin and backup duration. High-inrush loads such as motors, compressors and certain industrial machines require additional evaluation.

12. What information is required before selecting this UPS?

The buyer should provide:

• Total load in kW or kVA
• Three-phase input voltage
• Three-phase output voltage
• Type of connected equipment
• Required backup time
• Battery preference
• Maximum starting current
• Installation location
• Redundancy requirement
• Monitoring requirement
• Required quantity

13. Can the battery backup duration be customised?

Battery backup can generally be configured by selecting a suitable battery bank and charger arrangement. The final backup duration depends on the load percentage, battery voltage, battery capacity, battery age and environmental conditions.

14. Where should the UPS be installed?

The product is listed for indoor use. It should be installed in a clean, ventilated and accessible area with sufficient clearance for cooling, maintenance and battery installation.

15. Who should install the COSMIC MS 303U?

Installation, cabling, earthing, battery connection and commissioning should be completed by qualified electrical personnel or an authorised service team according to the approved technical specifications and site conditions.